When this bird flew, it uttered a cackling note a little like that of the domestic fowl; this note was noticed by Lewis and Clarke in the bird which they speak of under the name of the cock of the plains, and to which Mr. Ord has applied the name of tetrao fusca; a bird which, agreeably to their description, appears to be different from this, having the legs only half booted; the "fleshy protuberance about the base of the upper chop," and "the long pointed tail" of that bird may possibly be sexual distinctions.
It appears by the observations of Lewis and Clarke, that several species of this genus inhabit the country which they traversed, particularly in this elevated range of mountains, from whence, amongst other interesting animals, they brought to Philadelphia a specimen of the spotted grouse (T. canadensis); which, together with the above described bird, are now preserved in the Philadelphia Museum, thus proving that the spotted grouse is an inhabitant of a portion of the territory of the United States.
{204} In the evening, a thunder-storm rose in the east. It appeared for some time to approach, the thunder being loud and frequent, but at length moved off towards the south-east, continuing visible in the horizon during great part of the night.
July 11th [10th and 11th]. From our encampment we travelled nearly south, and crossing a small ridge dividing the waters of the Platte from those of the Arkansa, we halted to dine on a tributary of the latter river.[149] In an excursion from this place, we collected a large species of columbine, somewhat resembling the common one of the gardens. It is heretofore unknown to the flora of the United States, to which it forms a splendid acquisition. If it should appear not to have been described, it may receive the name of aquilegia cœrulea.[150] Our road during the morning lay for about twelve miles close along the foot of the primitive mountain, having on our left some of the sandstone ridges and hills already described. On our right, the brown and naked granite rose in shapeless masses far above our heads; and occasionally, as we passed the deep fissures worn by the descending torrents, we caught a view of the distant summits glittering with eternal frosts. In the valleys towards the east were many insulated and lofty hills, with perpendicular sides, and level table-like summits. They are sometimes disposed in parallel, but interrupted ranges, and sometimes irregularly scattered, without any appearance of order. In every instance they were found to be the remains of extensive beds of sandstone; insulated portions of which had been preserved from disintegration, while all the contiguous parts had crumbled down and been washed away.
One of these singular hills, of which Mr. Seymour has preserved a sketch, was called the Castle Rock, on account of its striking resemblance to a work of art. It has columns, and porticoes and arches, and {205} when seen from a distance has an astonishingly regular and artificial appearance.
July 12th. [10th and 11th cont'd.]. On approaching it, the base is found enveloped in an extensive accumulation of soil, intermixed with fragments of rapidly disintegrating sandstone. The lower portions of the perpendicular sides of the rock are of loosely cemented pudding-stone, but the summit is capped by a compact and somewhat durable sand-rock. This is surmounted by a scanty soil, in which are a few stinted oaks and junipers.
We had seen no bisons for several days, but in the afternoon a few were discovered at a distance from our course, and three men despatched in pursuit of them. They were grazing on the side of a hill near a mile distant. As provisions were growing scarce with us, we watched the progress of the hunters with some anxiety. At length the firing commenced, and we enjoyed a distant, though distinct view of the animating spectacle of a bison hunt. In a short time the hunters joined us with their horses loaded with meat.
We halted to dine on the tributary of the Arkansa before mentioned, nearly opposite the Castle Rock. Intermixed with the grass upon which we sat down to our dinner, we observed a small campanula, with a solitary terminal flower, about as large as that of the common hare-bell (C. decipiens). This species we believe to be identical with the C. uniflora of Europe, which has not been heretofore noticed in the United States.
In the afternoon we moved on, descending the little stream on which we had halted for dinner. Like the small branches of the Platte, it is inhabited by great numbers of beavers; but it has more timber, and a more fertile soil than any stream of similar magnitude we had lately passed. Some light showers occurred in the middle of the day, and at evening a thunder-storm was observed, in the same manner {206} as on the preceding day, to collect in the east, and after we had listened to its thunders for some time, it moved off in the direction of the Arkansa, but no rain fell where we were. In the course of the day several elk were seen, and at evening we killed an antelope. Robins are here frequent, and a jerboa was seen resembling the gerbillus canadensis; many fine plants were collected, several of which are hitherto undescribed.[151]
Towards evening, our guide discovered we had already passed considerably beyond the base of the peak, near which it had been our intention to halt. He also perceived at the same moment, he had arrived at the very spot where some years ago he had been made prisoner by a party of Spaniards, who took him to Santa Fé.[152] As we were particularly desirous of visiting the mountains at the point designated in many maps as the highest "peak," we resolved to return upon our course, but as it was now near sunset, we thought it advisable to encamp for the night.